/*
* Copyright 2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.yarn.listener;
import java.util.List;
/**
* Base implementation for all composite listeners.
*
* @author Janne Valkealahti
*
* @param <T> the type of the listener
*/
public class AbstractCompositeListener<T> {
/** List of ordered composite listeners */
private OrderedComposite<T> listeners;
/**
* Constructs instance with an empty listener list.
*/
public AbstractCompositeListener() {
listeners = new OrderedComposite<T>();
}
/**
* Sets the list of listeners. This clears
* all existing listeners.
*
* @param listeners the new listeners
*/
public void setListeners(List<? extends T> listeners) {
this.listeners.setItems(listeners);
}
/**
* Register a new listener.
*
* @param listener the listener
*/
public void register(T listener) {
listeners.add(listener);
}
/**
* Gets the listeners.
*
* @return the listeners
*/
public OrderedComposite<T> getListeners() {
return listeners;
}
}